Abstract: Provided are a dual fuel injector, an engine, and a control method for a dual fuel injector, relating to the technical field of engines. The dual fuel injector includes a fuel oil supply passage, a gaseous fuel supply passage, and a fuel injection portion. The fuel oil supply passage is used for delivering fuel oil, the gaseous fuel supply passage is used for delivering gaseous fuel, the fuel injection portion is used for being in communication with a combustion chamber, and the fuel injection portion is selectively in communication with the fuel oil supply passage, and the fuel injection portion is selectively in communication with the gaseous fuel supply passage.

Abstract: A memory access method comprises adding routing information to a memory page table, so that a memory management unit (MMU) queries, in a process of performing address translation on a virtual address (VA), the memory page table to obtain the routing information. After querying the memory page table and obtaining a physical address (PA), the MMU may directly route the PA based on the routing information, whereby a system address decoder (SAD) is not needed for further decoding the PA.

Abstract: A plurality of physical cores of a processor share a memory management unit (MMU) pool comprising a plurality of MMUs. The plurality of MMUs provides each physical core with an address translation function from a virtual address (VA) to a physical address (PA). If an address translation requirement of a physical core is high, for example, when a main memory is concurrently accessed, the plurality of MMUs can serve the physical core.

Abstract: An exhaust pipe, a method for optimizing and designing an exhaust pipe, and an engine are provided. The exhaust pipe includes a first exhaust pipeline arranged in a first direction, an EGR pipeline arranged in a second direction, and a pre-turbine pipeline arranged in a third direction. An input end of the EGR pipeline is communicated with an output end of the first exhaust pipeline, and an included angle ?.sub.1 between the first direction and the second direction is smaller than 60°. The pre-turbine pipeline, the EGR pipeline and the first exhaust pipeline are located in a first plane; the pre-turbine pipeline is communicated with the EGR pipeline, an included angle ?.sub.2 between the third direction and the second direction is smaller than or equal to 90°, and a cross-sectional diameter D of the pre-turbine pipeline is 0.2-1 times the diameter of the first exhaust pipeline.

Abstract: A memory address mapping method, a memory management unit, an electronic device, and a storage medium are provided. The method includes: receiving a virtual address from a current process; determining an address segment table and an address segment attribute table according to identification information of the current process; finding base address information from the address segment table according to a first virtual address segment, where the base address information indicates a base address of a target physical address space segment, and a physical address mapped to the virtual address is located in the target physical address space segment; finding offset information from the address segment attribute table according to a second virtual address segment, where the offset information indicates an offset of the physical address; and determining the physical address mapped to the virtual address according to the base address information and the offset information.

Abstract: This application discloses a memory protection method and a protection proxy control apparatus. In an example method, in response to determining that an accelerator or an input/output (I/O) device requests to access a system memory by using a direct physical address, the protection proxy control apparatus may obtain, based on an identifier of a data stream of the accelerator or the I/O device, permission information of a physical page table in which a physical address requested to be accessed by the data stream is located, and perform permission check on the memory access request based on the permission information.

Abstract: The present disclosure provides a preparation method for a seedling substrate using residues from Populus forests as raw materials and an application. The preparation method for a seedling substrate includes the following steps: crushing Populus fallen leaves into Populus fallen leaf scraps; crushing Populus dead branches into Populus dead branch scraps; mixing the Populus fallen leaf scraps, the Populus dead branch scraps, chicken manures and garden soil to obtain a mixture; adding effective microorganisms (EM) bacterial powder to the mixture for fermentation; and adding perlite during the fermentation to obtain a seedling substrate. The seedling substrate provided in the present disclosure is rich in microorganisms and comprehensive in nutrients, does not require additional fertilizers in a seedling stage, and is capable of promoting the growth of forest seedlings.

Abstract: An exhaust pipe, a method for optimizing and designing an exhaust pipe, and an engine are provided. The exhaust pipe includes a first exhaust pipeline arranged in a first direction, an EGR pipeline arranged in a second direction, and a pre-turbine pipeline arranged in a third direction. An input end of the EGR pipeline is communicated with an output end of the first exhaust pipeline, and an included angle ?1 between the first direction and the second direction is smaller than 60°. The pre-turbine pipeline, the EGR pipeline and the first exhaust pipeline are located in a first plane; the pre-turbine pipeline is communicated with the EGR pipeline, an included angle ?2 between the third direction and the second direction is smaller than or equal to 90°, and a cross-sectional diameter D of the pre-turbine pipeline is 0.2-1 times the diameter H of the first exhaust pipeline.

Abstract: This application provides a memory access method and a related device. The method includes: a second apparatus sends a first access request to a first apparatus, where the first access request includes an identity number, a first security check value, and first information, and the first information includes a first physical address. The first apparatus receives the first access request from the second apparatus, obtains a second security check value through computation based on the identity number and the first information, and determines an access permission of the second apparatus for the first physical address based on the first security check value and the second security check value.

Abstract: A memory access method comprises adding routing information to a memory page table, so that a memory management unit (MMU) queries, in a process of performing address translation on a virtual address (VA), the memory page table to obtain the routing information. After querying the memory page table and obtaining a physical address (PA), the MMU may directly route the PA based on the routing information, whereby a system address decoder (SAD) is not needed for further decoding the PA.

Abstract: A plurality of physical cores of a processor share a memory management unit (MMU) pool comprising a plurality of MMUs. The plurality of MMUs provides each physical core with an address translation function from a virtual address (VA) to a physical address (PA). If an address translation requirement of a physical core is high, for example, when a main memory is concurrently accessed, the plurality of MMUs can serve the physical core.

Abstract: A coupling thermal management system of a pure electric vehicle based on phase change heat storage. The system includes a refrigerant circuit and a coolant circuit, where heat exchange can be achieved between the refrigerant circuit and the coolant circuit through a plate type heat exchanger. The refrigerant circuit includes an electric compressor, an inside-vehicle heat exchanger, an outside-vehicle heat exchanger, a bidirectional electronic expansion valve, a four-way directional valve, a gas-liquid separator, first three-way valve, a first gate valve, a second gate valve, a plate type heat exchanger and a refrigerant tube. The coolant circuit includes a battery pack, a phase change material, a heat storage heat exchanger, a water pump, a second three-way valve, a third three-way valve, a fourth three-way valve and a coolant tube. The plate type heat exchanger is also included in the coolant circuit.

Abstract: This application discloses a memory protection method and a protection proxy control apparatus. In an example method, in response to determining that an accelerator or an input/output (I/O) device requests to access a system memory by using a direct physical address, the protection proxy control apparatus may obtain, based on an identifier of a data stream of the accelerator or the I/O device, permission information of a physical page table in which a physical address requested to be accessed by the data stream is located, and perform permission check on the memory access request based on the permission information.

Abstract: A high speed electric blower is provided. A rotor assembly of the blower has a bearing, a moving impeller and a magnetic ring. A housing of the blower has a bearing chamber. The diameter of the magnetic ring is smaller than the diameter of the bearing chamber. The magnetic ring can pass through the bearing chamber. The moving impeller and the magnetic ring are respectively located at either end of the bearing chamber. The single bearing is located between the moving impeller and the magnetic ring of the rotating shaft.

Abstract: An address translation method and apparatus are disclosed. The address translation apparatus includes: an interface, configured to receive one address translation request packet from a PCIe device, where the address translation request packet includes a first virtual address and a size of first virtual storage space, and the first virtual address is a virtual start address of the first virtual storage space; and an address translation unit, configured to determine P child page tables of a same size based on the first virtual storage space, where each child page table is used to indicate a mapping relationship from a virtual address to a physical address, a sum of sizes of the P child page tables is equal to the size of the first virtual storage space, P is an integer, and P?1.

Abstract: A pulse exhaust pipe for use with diesel engines an end of the pulse exhaust pipe is in communication with eight cylinders, and another end is in communication with two turbochargers; the pulse exhaust pipe includes three exhaust pipe sections which are separated from each other, each exhaust pipe section discharging to a turbocharger independently, wherein a first exhaust pipe section is in communication with a first and second cylinder, while a second exhaust pipe section is in communication with a third to a sixth cylinder, and a third exhaust pipe section is in communication with a seventh and eighth cylinder. The pulse exhaust pipe may prevent the backward flow of exhaust gas and inlet air back flow, thus increasing inflation efficiency and improving the uniformity of each cylinder. Also provided is a diesel engine installed with said pulse exhaust pipe.